#include<stdio.h>
#include<string.h>
#include<unistd.h>

int main()
{
    fprintf(stdout,"C:hello fprintf\n");
    printf("C:hello printf\n");
    fputs("C:hello fputs\n",stdout);

    const char *str="system call:hell write\n";
    write (1,str,strlen(str));

    fork();
    return 0;
}
